Boot and shoe nailing machine



(No Model.)

H. S. BACON.

BOOT AND SHOE NAILING MACHINE.

No. 319,773. Patented June 9, 1885.

N. PETERS. Phmo-Lflhagnphun Wahingtolv. n, c

ilnrren STATE PATENT Orrrce.

HENRY S. BACON, OF MILFORD, ASSIGNOR TO THE AMERICAN METALLIC FASTENING ASSOCIATION, OF BOSTON, MASSACHUSETTS.

BOOT'AND SHOE NAILING MACHINE.

forming part of Letters Patent N0.319,773, dated June 9, 1885.

Application filed April 6, 1885. (No model.)

To all whom it may concern.-

Be it known that I, HENRY S. BAcoN, of Milford, county of WVorcester, State of Massa chusetts, have invented a certain new and useful Improvement in Boot or Shoe Nailing Machines, of which the following is a full, clear, concise, and exact description, reference being had to the drawings accompanying and forming a part hereof, in whieh Figure lisa vertical section through apart of the standard of a nailingmachine, showing the mechanism of my improvement in elevation. Fig. 2 is a top view of my improvement from line 00 00, Fig. 1. Fig. 3 is a cross-section on line y 3 Fig. 2.

In bootor shoe nailing machines in which a horn is used, so arranged as to hold the stock firmly while the nail is being driven, and to recede or lower while the stock is being fed forward, the horn is usually locked in position and held rigid, except during the feeding forward of the stock. It is often desirable, however, to be able to lower the horn at a time when it is automatically locked and held rigid by the locking device.

The object of my invention is to provide a simple mechanism, hereinafter more fully described, by which the horn may be freed from the operation of the locking device, and thus enable it to be lowered at any time.

I have shown my invention as adapted to one form of nailing-machine. It will be obvious, however, that-it may be readily adapted for use on other machines which are provided with a horn arranged as above described.

I will describe my invention, using letters of reference to the accompanying drawings.

A is the standard of the machine. Bis the horn-supporting rod, which is supported by a spiral spring in the usual manner. a a are the jaws of the gripping or locking device, between which the rod 13 passes at b, Fig. 2. These grippers are pivoted to the standard by pivot d, which passes through a lug on each gripper, as shown. To the rear end of one of the grippers a the lever f is pivoted at h. The

end of this lever projects between and above the grippers a a, rearwardly of the pivot d, and is wedgeshaped in cross-section, (see Fig. 3,) while the sides of the grippers at this point are correspondingly inclined to receive this wedge-shaped end. When the wedge end of lever f is lowered, it forces the rear ends of the gripping-levers apart, thus closing the op posite ends upon the horn supporting rod B and preventing therod from movement. When the wedge is raised, a spiral spring set be tween the forward ends of the grippers at k.

Fig. 2, acts to press the grippers apart and;

frees the rod B. The lever f is raised or lowered by means of the connecting-rod D, secured to it by block F, and operated in the wellknown manner by cam mechanism on the main shaft. To the block F, I secure lever m by the pivot n, which is provided with an eccentric pin, 19, which bears in the end of leverf. To the other end of lever m, I attach a connecting-rod, E, the lower end of which is connected with a treadle mechanism attached to the lower part of the standard or frame of the machine at a convenient point. If the operator puts his foot on this treadle, he will raise the rod E and the rear end of lever m and cause the lever to turn on pivot 11, thus lowering eccentric p, and with it the rear end of lever f, and raising the wedge end of said lever, which operates, as will be obvious, to release the grippers a a. The lever m may of course be pivoted to a projecton on the standard, or in any other convenient manner, instead of to the block F, if desired.

hat is claimed is The combination, with the horn-supporting rod and grippers, of the gripper-operating lever f, block F, and lever m, pivoted to said block and provided with eccentric p, and having suitable operating mechanism, substantially as shown and described.

HENRY S. BACON.

Witnesses:

WM. A. MAcLEon, ROBERT WALLACE. 

